Love him to death but HATE sex with him

I dread having sex with him it’s awful. 5 min of just awful. I never cum, he does all the time. I fake moan but really in my head I’m thinking of what show I’m watch or shopping on Amazon, or answering that text I heard come through. I’ve told him that I don’t enjoy sex with him and he was lost for words. Ever since we meet he has been bad at sex and I do mean always. Maybe once a month I will enjoy the 5 min of sex with him. I even will have the baby sleep in our bed to avoid sex with him, or ask him to sleep in another room so his alarm doesn’t wake me. Idk what to do and lately I been thinking of sleeping with someone else. I wouldn’t do it because I love him more then anything. He is small. He doesn’t even do 4 play correct but that wouldn’t matter because he come from me just rubbing on it for a few minutes. As much as I try not have sex, we still do it about 4 times a week. I can’t see myself leaving over bad sex because we are other wise great together. Besides the sex he is the man I’ve always wanted. I know people will say leave him but that’s not happening anything else I can do? We been together 9 years and yes 9 years of this kind of sex so I usually touch myself in the shower or when he at work. But again lately I can’t stop thinking of sex with another man just filling me up.